Nickel Pollution: Airborne Threat Or Safe?

is nickel pollution airborne

Nickel is a naturally occurring element that is distributed in the environment, including in the air, water, and soil. While nickel has essential biological functions, such as supporting the healthy growth of plants, animals, and soil/water microbes, it can also have toxic effects on both humans and the environment. Nickel pollution is primarily caused by anthropogenic activities, such as industry, the use of liquid and solid fuels, and municipal and industrial waste. This pollution can lead to nickel being present in the air, water, and soil, resulting in potential exposure to humans and other organisms. Given the potential health risks associated with nickel exposure, it is important to understand the sources and impacts of airborne nickel pollution to mitigate its effects on the environment and human health.

Characteristics Values
Nickel pollution sources Industry, use of liquid and solid fuels, municipal and industrial waste, ship and aircraft emissions, cigarettes, inefficient vehicles' engines, oil refining, cryogenic containers, pollution abatement equipment, plumbing materials, nickel alloys, nickel-plated items, soap, oils, and fats
Nickel health effects Allergy, cardiovascular and kidney diseases, lung fibrosis, lung and nasal cancer, epigenetic alterations, apoptosis in human epatoma cells, human T hybridoma cells, and human breast cancer, interference with miRNA network, DNA hypermethylation, histone modification, condensed chromatin structure, cardiovascular and thermoregulatory issues
Nickel environmental effects Soil fertility degradation, growth of plants, animals, and soil/water microbes affected
Nickel phytoremediation Phytoremediation and phytoextraction are cost-effective methods to remove nickel pollution using plants
Nickel pollution levels Mean concentrations of nickel in seven major cities in Korea over a 13-year period fell within the range of 3.71 (Gwangju) to 12.6 ng m−3 (Incheon), with moderate reductions in most cities over time

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Nickel is present in ambient air, water, and food

Nickel is a transition element that is widely distributed in the environment, including in ambient air, water, and soil. Its presence in the environment may be due to natural sources and human activities such as industry, the use of liquid and solid fuels, and municipal and industrial waste.

Nickel is present in ambient air due to pollution from heavy metals, which is considered one of the most significant outcomes of societal evolution. Studies have detected particulate matter-associated nickel in ambient air, with potential adverse effects on both the cardiovascular and respiratory systems. For example, exposure to nickel has been linked to changes in cardiac function and increased mortality in susceptible populations.

Nickel is also present in water, with varying concentrations depending on the source and location. Phytoremediation, a biological method that utilizes plants to absorb and accumulate heavy metals, can be employed to reduce nickel pollution in water and soil.

Nickel is found in various foods, with the nickel content differing among food types and preparation methods. Dairy products, for instance, typically have low nickel content, with cream, sour cream, and cream cheese containing less than 1 microgram per serving. To manage nickel hypersensitivity, a recommended daily upper limit of 150 micrograms is suggested, which equates to an average of less than 10 micrograms of nickel per serving across all meals and snacks.

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Nickel pollution is caused by industry, fuel use, and waste

Nickel pollution is caused by a combination of natural sources and anthropogenic activity. While nickel is naturally present in the Earth's crust, human activities such as industry, fuel use, and waste generation have led to increased levels of nickel pollution in the environment.

Industry

Nickel pollution is closely associated with the mining and processing of nickel. The extraction and refining of nickel ore can release nickel particles into the air, contributing to air pollution. Additionally, the use of nickel in various industrial processes, such as alloy production, electroplating, and battery manufacturing, can also result in nickel pollution if proper emissions controls are not in place.

Fuel Use

The combustion of fossil fuels, particularly liquid and solid fuels, can release nickel into the atmosphere. Nickel is a component of crude oil, and its combustion can lead to nickel pollution in the air. Additionally, the use of fossil fuels in industrial processes, such as power generation and transportation, can contribute to nickel emissions.

Waste

Municipal and industrial waste are significant sources of nickel pollution. Improper disposal of nickel-containing waste, such as batteries, electronic waste, and industrial by-products, can result in nickel leaching into the soil and water. Deep-sea tailings disposal (DSTD), a common waste management practice in the nickel industry, has been linked to water pollution and ecological damage. Inadequate waste management practices can also impact indigenous communities, as nickel pollution can contaminate water sources used for fishing and farming, affecting both livelihoods and health.

Nickel pollution is a pressing environmental issue due to its ubiquity and toxic effects on human health and ecosystems. While natural sources contribute to nickel levels in the environment, anthropogenic activities, such as those mentioned above, have significantly increased the presence of nickel pollution in the air, water, and soil.

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Nickel exposure causes cardiovascular and respiratory issues

Nickel is a silvery-white metallic element found in the earth's crust. It is distributed in the environment through natural processes, such as the spread of dust and volcanic eruptions, and human activities, such as industrial waste and the use of liquid and solid fuels. The general population is exposed to low levels of nickel in the air, water, food, and even tobacco smoke.

Nickel exposure has been linked to various adverse health effects, particularly concerning the respiratory and cardiovascular systems. Studies have evaluated the relationship between nickel exposure and respiratory or cardiovascular outcomes, with nickel in ambient particulate matter (PM) being more frequently associated with these outcomes than other metal constituents of PM.

Short-term exposure to nickel has been associated with respiratory tract irritation, sinusitis, rhinitis, asthma, and pulmonary fibrosis. Inhalation of nickel nanoparticles has been linked to acute respiratory distress syndrome, with nanoparticles found in lung tissue macrophages. Abnormal chest x-ray findings in individuals with nickel exposure include pleural effusion, irregular linear shadows, and nodular mottling, suggestive of lung involvement.

Chronic nickel exposure has been linked to the development of lung and nasal cancer. Occupational exposure to nickel has been associated with an increased risk of sino-nasal cancers, including squamous cell carcinoma, anaplastic carcinoma, and adenocarcinoma.

Cardiovascular manifestations of nickel exposure include abnormal electrocardiogram (ECG) findings, such as sinus tachycardia (an abnormally fast heart rate) and myocardial injury, reflected by ST segment and T wave changes.

While the literature suggests associations between nickel exposure and respiratory and cardiovascular issues, the overall evidence is limited by methodological challenges, and the biological plausibility of these associations is supported only at high concentrations of exposure.

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Nickel is carcinogenic and causes lung and nasal cancer

Nickel is a naturally occurring element that can be found in the air, water, and soil. It is also used in various industrial processes, which can lead to nickel pollution in the environment. While nickel has many useful properties, such as corrosion resistance and strength, it can pose a significant health risk to humans if inhaled or ingested.

Nickel is classified as a known human carcinogen by the International Agency for Research on Cancer (IARC). Studies have shown that exposure to nickel compounds, particularly through inhalation, can increase the risk of lung and nasal cancer. Workers in industries such as mining, smelting, welding, and refining are at the highest risk of exposure to nickel and, consequently, of developing respiratory cancers.

The mechanism by which nickel causes cancer is complex and not yet fully understood. However, researchers have found that nickel can induce epigenetic alterations, specifically DNA hypermethylation, histone modification, and interference with the miRNA network, leading to gene silencing, tumor initiation, and progression. In addition, nickel is thought to substitute Ni2+ for Fe2+ in non-heme iron dioxygenases, which play a role in DNA and histone demethylation.

Epidemiological studies have consistently shown an association between nickel exposure and increased lung and nasal cancer risk. In particular, workers in dusty, high-exposure refinery processes have been found to have a higher risk of developing respiratory cancers. Animal studies have also corroborated the respiratory carcinogenicity of certain nickel compounds, especially insoluble compounds.

It is important to note that the general public may also be exposed to low levels of nickel in the air, water, food, and tobacco smoke. However, the risk of developing cancer from low-level nickel exposure is much lower than for workers in high-exposure occupations. Nevertheless, efforts to reduce nickel pollution and protect workers from exposure are crucial to mitigate the health risks associated with this carcinogen.

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Phytoremediation uses plants to reduce nickel pollution

Nickel is a transition element that is widely distributed in the environment, including in the air, water, and soil. Nickel pollution may be due to industry, the use of liquid and solid fuels, and municipal and industrial waste. Nickel is known to be toxic to humans, causing various side effects such as allergies, cardiovascular and kidney diseases, lung fibrosis, and lung and nasal cancer.

Phytoremediation is a cost-effective and environmentally friendly technique that utilizes plants to reduce, stabilize, or degrade pollutants in the environment. It takes advantage of the ability of certain plants, called hyperaccumulators, to bioaccumulate, degrade, or render harmless contaminants in the soil, water, and air. Phytoremediation is a promising approach for the revegetation of heavy metal-polluted land, including nickel pollution.

For nickel hyperaccumulation, native accumulator plants can be used. These plants can uptake and accumulate nickel in their tissues through a process called phytoextraction. The nickel is then concentrated in the plant, with a minimum threshold of 1000 mg/kg of dry weight required for hyperaccumulation.

The use of phytoremediation to reduce nickel pollution has been studied in various contexts. For example, a 13-year study in seven major cities in Korea investigated the environmental behavior and pollution status of airborne nickel. The results showed a gradual reduction in nickel levels over time, with values maintained below the international threshold.

Overall, phytoremediation is a sustainable and economical solution for remediating soil and water from organic and inorganic pollutants, including nickel pollution. It is a reliable and aesthetically pleasing alternative to conventional technologies, with good public acceptance.

Frequently asked questions

Yes, nickel is present in the air, water, and soil. It is emitted from anthropogenic sources, including vehicle engines, oil refining, and tobacco products.

Exposure to airborne nickel pollution can cause various health issues, including cardiovascular and respiratory problems, lung fibrosis, and cancer. It is also associated with acute changes in heart rate and an increased risk of mortality.

Reducing industrial emissions and using alternative materials in products can help decrease airborne nickel pollution. Phytoremediation, which utilizes plants to absorb and remove nickel from the environment, is another effective method to mitigate nickel pollution.

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